<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box"><img src="../assets/logo.png" /></div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="el-icon-user"
            placeholder="账户"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            type="password"
            prefix-icon="iconfont icon-3702mima"
            placeholder="密码"
            v-model="loginForm.password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLofinForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'login',
  data() {
    return {
      //登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      //表单的严重规则对象
      loginFormRules: {
        //用户名是否合法
        username: [
          { required: true, message: '请输入账户', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        //密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    resetLofinForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200)
          return this.$message({
            message: '登录失败',
            type: 'error',
            duration: 500,
          })
        this.$message({
          message: '登录成功',
          type: 'success',
          duration: 500,
        })
        //将登录成功之后的token保存到客服端的sessionStorage中
        //token只应在当前网站打开的期间生效
        sessionStorage.setItem('token', res.data.token)
        setTimeout(() => {
          this.$router.push('/home')
        }, 500)
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 550px;
  height: 350px;
  background-color: #fff;
  border-radius: 10px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.avatar_box {
  height: 150px;
  width: 150px;
  border: 1px solid #eee;
  border-radius: 50%;
  box-shadow: 0 0 10px;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}

.login_form {
  position: absolute;
  bottom: 40px;
  width: 100%;
  padding: 0 15%;
  box-sizing: border-box;
}
</style>
